Isovaleramid derivative and process of making same.



Nr'rEn SrA'rEs FFICE.

PATENT ARTHUR LIEBRECHT, OF ERANKEORT-ON-TnE-MAIN GERMANY, AssIeNoR TO EARBWERKE, vORM. MEIsTER, LUOIUs dzBRUNING, OF HOOHST-ON- THE-MAIN, GERMANY, A CORPORATION OF GERMANY.

lSOVALERAMID DERIVATIVE AND PROCESS OF MAKING SAME.

SPECIFICATION forming part of Letters Patent N0. 697,730, dated April 15, 1902. Application filed July 17,1901. Serial No. 68,622. (Specimens) To'rtZZ zuhont it may concern:

Be it known that I, ARTHUR LIEBREOHT,

Ph. D., a citizen of the Empire of Germany,

residing at Frankfort-on-the-Main, Germany, have invented certain new and useful Improvements in Isovaleramid Derivatives and Processes of Making Same, of which the following is a specification.

The dialkylated derivatives of isovaleramid and bromisovaleramid, unlike valeramid and isovaleramid, which are of little effect, have astrong action as drugs, rendering them valuable in therapeutics. These dialkylated isovaleramids have hitherto been unknown. Only the alphylamids of isovaleric acid and its bromin derivatives and a benzyl-bromiso- Valera-mid have been described; but these, like the dialkylamids of trimethylacetic acid, are unimportant in pharmacology.

This invention relates to the manufacture of these derivatives of isovaleramid. For this purpose isovaleric acid, its anhydrid, ester, amid, acid chlorid,'or the corresponding derivatives from bromovaleric acid are 2 5 treated with secondary amins. Instead of isovaleric acid the ordinary officirial baldrianic acid may be used, its principal constituent being isovaleric acid.

The following examples illustrate the in- 0 vention.

Example I: The isovalerate of diethylamin is heated for six hours at 230 centigrade in a closed vessel, and the product thus obtained is dissolved in ether and shaken with a so- 3 5 lution of sodium carbonate to remove un-. changed Valerie acid. The etherial solution is then dried, the ether evaporated, and the residue distilled, whereupon the isovaler-diethylamid passes over as a liquid at 205 to The product has an odor 208 centigrade.

It is readily solulike that of peppermint.

'blein alcohol and ether and is soluble with The product is washed with water to remove a the hydrobromid of diethylamin and excess of diethylamin. The etherial solution is then dried and distilled in a vacuum. After the other has passed over the bromisovaler-diethylamid distils at 130 to 135'centigrade and twenty millimeters pressure. The product is very easily soluble in alcohol and benzene, but less soluble in ether. It is soluble with difficulty in water.

Having now described my invention, what I claim isa 1. Process for the manufacture of dialkylated amids of isovaleric and bromisovaleric acids, which consists in treating the compounds of isovaleric acid described with dialkylated amins, substantially as set forth.

2. As a new product, the dialkylated amid of isovaleric acid, distilling between 205 and 208 at twenty millimeters pressure, soluble with difiiculty in water, readily soluble in alcohol, and benzene, but less soluble in ether, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

ARTHUR LIEBREOI-IT.

Witnesses:

ALFRED BRIsBOIs, J OHANN I'IARTENSTEIN. 

